RETINAL LIGHT By N., Pam M.S. - April 28, 2013 Light detected in the absence of light stimulus, believed to be caused by fundamental processes carried out by the visual system. Also known as: dark light. RETINAL LIGHT: "Retinal light occurs without the input of light stimulus." Related Psychology Terms PHOSPHENE ARAGO PHENOMENON ASTIGMATISM BRIGHTNESS BRIGHTNESS PERCEPTION GRATING PHOTOMA BRIGHTNESS THRESHOLD MOVING-EDGE DETECTOR PERIMETER Cite this page: N., Pam M.S., "RETINAL LIGHT," in PsychologyDictionary.org, April 28, 2013, https://psychologydictionary.org/retinal-light/ (accessed August 3, 2020).